A novel wideband waveguide antenna with excellent performance is proposed. which is composed of a coaxial-waveguide transition and an open-ended rectangular waveguide loaded with a pair of horizontal umbrella-shaped metallic brims. The brims perpendicular to two broad walls of the waveguide are constructed to modulate the antenna to radiate nearly identical E- and H-plane radiation pa... https://halohealthcarers.shop/product-category/bibs/